Shabbir has a brother one-fourth of his age and a sister two times of his age. If the combined age of all the three siblings is twenty more than thrice the age of the youngest, how old is Shabbir's sister?
A. 2
B. 16
C. 2.5
D. 8
E. None of these
সঠিক উত্তরঃ
B.
16
Explanation:
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